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HIGH severity

CVE-2011-4343 — myfaces-core-module

HIGHFix: apache/myfaces@a74b551

CVE-2011-4343 is a high-severity (CVSS 7.5) Information Exposure vulnerability in org.apache.myfaces.core:myfaces-core-module. A fix is available for org.apache.myfaces.core:myfaces-core-module — see the affected versions and patch details below.

Apache MyFaces Vulnerable to EL Injection

Published
Updated
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Nov 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
5.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs93th percentile — riskier than 93% of all scored CVEsHighest risk
0.00%2.23%4.45%6.68%0.9%5.3%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected
☕org.apache.myfaces.core:myfaces-core-module☕org.apache.myfaces.core:myfaces-core-module

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

Information disclosure vulnerability in Apache MyFaces Core 2.0.1 through 2.0.10 and 2.1.0 through 2.1.4 allows remote attackers to inject EL expressions via crafted parameters.

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.apache.myfaces.core:myfaces-core-module≥ 2.0.1&&< 2.0.112.0.11org.apache.myfaces.core:myfaces-core-module:2.0.11
☕Mavenorg.apache.myfaces.core:myfaces-core-module≥ 2.1.0&&< 2.1.52.1.5org.apache.myfaces.core:myfaces-core-module:2.1.5

Affected Products

1 product · 15 configurations
Application
myfacesapache
15 versions
2.0.12.0.22.0.32.0.42.0.52.0.62.0.72.0.82.0.92.0.102.1.02.1.1

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.apache.myfaces.core:myfaces-core-module, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.apache.myfaces.core:myfaces-core-module to 2.0.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2011-4343 is resolved across your whole dependency graph.

  3. Workarounds

    Assume what was exposed is already known: rotate any credential, token or key that the affected component could return, restrict the endpoint to callers that genuinely need it, and strip sensitive fields from responses and error output at the boundary rather than relying on the client not to read them.

Frequently Asked Questions

Information disclosure vulnerability in Apache MyFaces Core 2.0.1 through 2.0.10 and 2.1.0 through 2.1.4 allows remote attackers to inject EL expressions via crafted parameters.
O3 Security · Impact-Aware SCA

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CVE-2011-4343: myfaces-core — Fixed in 2.0.11